Wrench



Patented Aug. 23, 1932 STATE S Jon s. MCKIBBON, or COLUMBIA, 'rnnlvnssnnWRENCH Application tiled October 1, 1930; Serial No. 485,714.

struction, cheap to manufacture, and convenient in use.

In the accompanying drawing, forminga part of this specification, and inwhich like numerals are employed to designate like parts throughout thesame,

Figure 1 is a side elevation of a wrench embodying my invention,showingv the jaws in closed position, v

T Figure 2 is asimilar view with the jaws somewhat opened, partsbeing'shown in central vertical longitudinal section,

Figure3is a similar view, with the jaws further opened and parts incentral vertical longitudinal section, and Figure l is a per- 80spective view of a sleeve included in anad- 'justabl e connection orturn-buckle between the jaws. r

In'the drawing, wherein for the purpose of illustration, is shown apreferred embodiment of my invention, the-numeral 5 designa'tesa-handle, provided at its forward end with an enlarged portion 6,carrying a: shank 7, preferablyintegral therewith, and this shankcarries'a. stationary jaw 8. Arranged opposite the stationary jaw 8 is amovable jaw 9,-carr'ied by a movable'shank 10. The jaws 8=and 9 areprovided upontheir inner --faces with serrations 1'1, as shown. Theenlarged portion 6'is provided upon one side of theshank 7' withxarecess 12, having a curved wall 13, as shown. This recess receivestherear end of the'movable shank 10, havingiacurved face 14. The recess 12has a greater width: than the end' of the'shank 10,- as' shown.

Y The shank 10 is provided, near its rear end, with a transverselyinclined slot 15, which slot is longitudinally curved, as shown. Theslot 15-is disposed at anangle of about 45 to the longitudinal axis ofthe shank 10. The slot 1 5 receives a pin 16, rigidly attached to theside walls of the recess 12- This pin engages the rear wall ,ofthe slot15 and thereby limits the forward movement of the shank 10, and willengage the forward end wall of the slot 15, to thereby limit the rear,-ward movementof, the shank 10. The shank 10' is. projected forwardly bymeans of a compressiblecoil spring 17, held within a recess l8, and theforward end of this spring receives a lug 19, projecting from the rearend of the shank 10.

An adjustable connecting element or turnbuckle 20 is employed forconnecting the jaws 8 and 9. This adjustable connecting elementcomprisesbolts 21, provided at their outer ends with eyes'22. 7 Thesebolts are arranged withintransverse recesses, 23, formed within thejaws, and the eyes 22 receive pins or pivots 24-, attached to the aws.The bolts 21 receive thereon a rotatable .sleeve 24:, havingscrew-threaded engagement therewith,the threads ofthe bolts beingpositively pitched. The sleeve is provided with a milled head 25,arranged centrally thereof, and this milled-head is disposed adjacent torecesses or depressions-26, so that it may beconveniently engaged withthe thumb or fingers, to turn the same. I 7

The operation of the wrench is as follows:

The sleeve 24 is turned to move the jaw 9 from the stationary jaw 8, fora considerable distance, depending upon the size of the work, such as'apipe. The jaws. are then'applied to the opposite sides of the work, andwhen the handle 5 is swung downwardly to turn the work, thepressure'shifts the movable shank IOlongitu'dinally and rearwardly withrelation to the shank 7 but, at the same time, the pin 16'beingarrangedwithin the slot 15, will shift the rear end of the shank 10 out wardly,causing the movable jaw 9 to be swung inwardly, for binding action-withthe work. The reverse of this action occurs when the handle 5 is swungin the opposite direc- Ill tion, for taking a new hold on the work, theshank 10 being projected forwardly by the spring 17, when the pressureis released therefrom.

It is to be understood that the form ofmy invention herewith shown anddescribed, is to be taken as a preferred example of the same, and thatvarious changes in shape, size and arrangement of parts may be resortedto without departing from the spirit of my invention, or the scope ofthe subjoined claims.

Having thus described my invention, I claim 1. A wrench comprising ahandle having a stationary shank and a stationary jaw carried by saidshank, a longitudinally movable shank carrying movable jaw arrangedopposite the stationary jaw, said movable shank being provided near itsrear end with a transversely inclined slot, a pin secured to the handleand operating within the transversely inclined slot, and an adjustablecoupling arranged in advance of the slot and pin and having pivotalconnections with both jaws for shifting the movable jaw laterally withrelation to the stationary jaw, the arrangement of the transverselyinclinedslot and pin and adjustable coupling being such that the rearend of the movable shank is automatically shifted laterally andoutwardly upon the rearward longitudinal movement of the movable shank.

2. A wrench comprising a handle having a stationary shank and astationary jaw carried by said shank, a longitudinally movable shankcarrying a movable jaw arranged 0pposite the stationary jaw, said shankbeing provided near its rear end with a transversely inclined slot, apin secured to the handle and operating with the transversely inclinedslot, an adjustable coupling arranged in advance of the inclined slotand pin and having pivotal connections with both jaws for shifting posedat an angle with relation to the longitudinal axis of the movable shank,a pin secured to the handle and operating within said slot, and anadjustable coupling arranged in advance of the slot and pin andpivotally connected with both jaws for shifting the movable shanklaterally with relation to the stationary j aw, the arrangement of theslot and rpin and coupling permitting the rear end of the movable shankto be automatically shifted laterally and outwardly upon the rearwardlongitudinal movement of the movable shank.

4c. A wrench comprising a handle provided at its forward end with anenlarged portion carrying a stationary shank and a stationary jawcarried by such shank, the en-' larged portion of the handle also havinga recess therein, a longitudinally movable shank having its inner enddisposed insaid recess and at its outer end carrying a jaw arranged fordisposition opposite the stationary jaw, the inner end of the movableshank having'an inclined slot, a pin passing through the slot of themovable shank and having connection with the handle whereby to effect apivotal connection of the movable shank with the handle, means forcoupling he movable shank and 1ts aw to the fixed shank so as to bemovable longitudinally and laterally with relation to the stationaryshank and its jaw, the arrangement of the said slot and pin being suchthat the rear end of the movable shank is automatically shiftedlaterally and outwardly upon the rearward longitudinal movement of themovable shank. I v

5. A wrench comprising a handle provided at its forward end with anenlarged portion carrying a stationary shank and a stationary jawcarried by such shank, the enlarged portion of the handle also having arecess therein, a longitudinally movable shank having its inner enddisposed in said recess and at its outer end carrying a jaw arranged fordisposition opposite the sta -tionary jaw, the inner end of the movableshank having an inclined slot, a pin passing through the slot of themovable shank and having connection with the handle whereby to effect apivotal connection of the movable shank with the handle, adjustablemeans for coupling the movable shank and its jaw to the fixed shank soas to be movable longitudinally and laterallyv with relation to thestationary shank and its jaw, the arrangement of the said slot and pinbeing such that the'rear end of the movable shank is automaticallyshifted laterally and outwardly upon the rearward longitudinal movementof the movable shank, and a spring located in said recess and havingengagement with the inner end of said movable shank to normallyshift themovable shank forwardly.

6. A wrench comprising a handle having a stationary shank and astationary jaw carried by said shank, said stationary shank having arecess formed therein, a longitudinally movable shank carrying a movablejaw arranged opposite the stationary jaw, said movable shank beingprovided near its forward end With a recess and being provided near itsrear end With a transversely inclined slot, a pin secured to the handleand operating within the traversely inclined slot, bolts extending intothe recesses of the shanks and having eyes disposed within saidrecesses, pins carried by the shanks and pivotally mounted within saideyes, and a rotatable sleeve having screw-threaded engagement with saidbolts, said bolts and sleeve being arranged in advance of the inclinedslot and pin and said bolts having pivotal connections with both shanks.

In testimony whereof I aflix my signature.

JOE S. MoKIBBON.

